28026167895990 has 320 divisors, whose sum is σ = 87218399600640. Its totient is φ = 6385944821760.

The previous prime is 28026167895989. The next prime is 28026167895997. The reversal of 28026167895990 is 9959876162082.

28026167895990 is a `hidden beast` number, since 2 + 8 + 0 + 26 + 1 + 6 + 7 + 8 + 9 + 599 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28026167895997) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 20848054 + ... + 22151606.

It is an arithmetic number, because the mean of its divisors is an integer number (272557498752).

Almost surely, 2^{28026167895990} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28026167895990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43609199800320).

28026167895990 is an abundant number, since it is smaller than the sum of its proper divisors (59192231704650).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28026167895990 is a wasteful number, since it uses less digits than its factorization.

28026167895990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1303729 (or 1303720 counting only the distinct ones).

The product of its (nonzero) digits is 235146240, while the sum is 72.

The spelling of 28026167895990 in words is "twenty-eight trillion, twenty-six billion, one hundred sixty-seven million, eight hundred ninety-five thousand, nine hundred ninety".